Your Veterinarian: The Ultimate Vaccine Authority by DOGS NATURALLY on MARCH 7, 2012 ·

[Amateur de chiens - Dog Lovers]

Below is a summary of the bulk of his research.  It’s pretty obvious that the core vaccines last very likely for the life of the dog and certainly a lot longer than one or three years.  It is important to note that he states that this is the minimum duration of immunity.  Those upper numbers reflect the duration of the study, not the time at which immunity began to decline.

Table 1: Minimum Duration of Immunity for Canine Vaccines
Vaccine	Minimum Duration of Immunity	Methods Used to Determine Immunity
CORE VACCINES
Canine Distemper Virus (CDV)
Rockbom Strain	7 yrs / 15 yrs	challenge / serology
Onderstepoort Strain	5 yrs / 9 yrs	challenge / serology
Canine Adenovirus-2 (CAV-2)	7 yrs / 9 yrs	challenge-CAV-1 / serology
Canine Parvovirus-2 (CAV-2)	7 yrs	challenge / serology
Canine Rabies	3 yrs / 7yrs	challenge / serology

suite ici

http://www.dogsnaturallymagazine.com/veterinarian-ultimate-vaccine-...